Garmin G1000 NAV III Line Maintenance Manual page 69

Symptom
No COM Audio
Mic Audio Heard in Speaker
2.3.3 GMA Alerts
Message
MANIFEST – GMA1 software
mismatch. Communication
Halted.
GMA1 SERVICE – GMA1 needs
service. Return unit for repair.
GMA1 FAIL – GMA 1 is
inoperative.
GMA1 CONFIG – GMA1
configuration error. Config
service req'd.
G1000 Nav III Line Maintenance Manual
190-00352-00
Recommended Action
•
Verify the COM radios are not tuned to the same frequency and each
volume adjusted to the same level. Reference Garmin Service
Advisory 0535.
•
Reduce ICS Volume
Cause
The system has detected an
incorrect software version
loaded in GMA 1347.
The G1000 has determined
GMA1 needs service.
The G1000 has detected a
failure in GMA1.
The G1000 has detected a
GMA configuration
mismatch.
Solutions
•
Load correct software version.
•
Replace GMA1
•
Ensure GMA1 is receiving power
•
Ensure both GIAs are receiving power
•
Ensure all GDUs are receiving power
•
Ensure the GMA/GIA RS-232 data lines
are working properly
•
Ensure the GIA/GDU Ethernet data
lines are working properly
Replace GMA
o
•
Load GMA configuration file, see
Section 4.2.2.
Replace GMA.
o
If problem persists, replace master
o
configuration module, check config
module wiring for faults and replace
if necessary.
NOTE
New Terrain/Obstacle cards, Jeppesen
Aviation Database and other optional
features (i.e. TAWS unlock card) will need
to be replaced if the master configuration
module is changed. The G1000 System ID
number will change to a new number when
installing a new master config module. The
old Terrain and other cards will no longer
work as they will remain locked to the old
System ID number.
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Rev. L